EP 0908791 B1 20030723 - Subpixel misregistration correction by means of ros rephasing a multiphase image on an image color printer
Title (en)
Subpixel misregistration correction by means of ros rephasing a multiphase image on an image color printer
Title (de)
Unterpixel-Korrektur von Fehlüberdeckungen mittels eines Rasterausgabeabtasters zur Wiedereinphasung eines mehrphasigen Bildes in einem Farbdrucker
Title (fr)
Correction inférieure au pixel d'une fausse registration par le dispositif de balayage de trames au moyen du rephasage des images multiphases dans l'imprimante électrophotographique en couleur
Publication
Application
Priority
US 93879797 A 19970926
Abstract (en)
[origin: EP0908791A2] An imaging system for forming multiple superimposed image exposure frames on a photoconductive member (22) moving in a process direction including a rotating polygon (26) having a plurality of facets (25). A raster output scanner forms a plurality of scanlines in a transverse direction across the photoconductive member (23) by reflecting modulated beams from the rotating polygon (26). A method of re-phasing the relationship between the beginning of scanlines and the rotating polygon by sensing a photoconductive member indicator (Tn) for registering images on the photoconductive member, detecting the beginning of scanlines and providing a start of scan (SOS) signals representing the detection, determining the relative phase between the start of scan signals and the detection of the indicator, and changing the speed of the rotating polygon (26) to synchronize the phase of the indicator with the lead edge of the SOS signals. <IMAGE>
IPC 1-7
IPC 8 full level
B41J 2/44 (2006.01); G02B 26/10 (2006.01); H04N 1/047 (2006.01); H04N 1/113 (2006.01); H04N 1/12 (2006.01)
CPC (source: EP)
H04N 1/047 (2013.01); G03G 2215/0158 (2013.01); G03G 2215/0174 (2013.01); H04N 1/1135 (2013.01); H04N 1/12 (2013.01); H04N 2201/0471 (2013.01); H04N 2201/04722 (2013.01); H04N 2201/04732 (2013.01); H04N 2201/04744 (2013.01); H04N 2201/04755 (2013.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0908791 A2 19990414; EP 0908791 A3 20000830; EP 0908791 B1 20030723; DE 69816555 D1 20030828; DE 69816555 T2 20040603; JP H11157130 A 19990615
DOCDB simple family (application)
EP 98307186 A 19980907; DE 69816555 T 19980907; JP 27368598 A 19980928